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Wang Q, Wu S, Shuai J, Li Y, Fu X, Zhang M, Yu X, Ye Z, Ma B. Dual Gene Detection of H5N1 Avian Influenza Virus Based on Dual RT-RPA. Molecules 2024; 29:2801. [PMID: 38930866 PMCID: PMC11206350 DOI: 10.3390/molecules29122801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/07/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024] Open
Abstract
The H5N1 avian influenza virus seriously affects the health of poultry and humans. Once infected, the mortality rate is very high. Therefore, accurate and timely detection of the H5N1 avian influenza virus is beneficial for controlling its spread. This article establishes a dual gene detection method based on dual RPA for simultaneously detecting the HA and M2 genes of H5N1 avian influenza virus, for the detection of H5N1 avian influenza virus. Design specific primers for the conserved regions of the HA and M2 genes. The sensitivity of the dual RT-RPA detection method for HA and M2 genes is 1 × 10-7 ng/μL. The optimal primer ratio is 1:1, the optimal reaction temperature is 40 °C, and the optimal reaction time is 20 min. Dual RT-RPA was used to detect 72 samples, and compared with RT-qPCR detection, the Kappa value was 1 (p value < 0.05), and the clinical sample detection sensitivity and specificity were both 100%. The dual RT-RPA method is used for the first time to simultaneously detect two genes of the H5N1 avian influenza virus. As an accurate and convenient diagnostic tool, it can be used to diagnose the H5N1 avian influenza virus.
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Affiliation(s)
- Qian Wang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (Q.W.); (S.W.); (M.Z.); (X.Y.); (Z.Y.); (B.M.)
| | - Shiwen Wu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (Q.W.); (S.W.); (M.Z.); (X.Y.); (Z.Y.); (B.M.)
| | - Jiangbing Shuai
- Zhejiang Institute of Inspection and Quarantine Science and Technology, Hangzhou 311241, China;
| | - Ye Li
- Zhejiang University of Science and Technology, Hangzhou 310023, China;
| | - Xianshu Fu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (Q.W.); (S.W.); (M.Z.); (X.Y.); (Z.Y.); (B.M.)
| | - Mingzhou Zhang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (Q.W.); (S.W.); (M.Z.); (X.Y.); (Z.Y.); (B.M.)
| | - Xiaoping Yu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (Q.W.); (S.W.); (M.Z.); (X.Y.); (Z.Y.); (B.M.)
| | - Zihong Ye
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (Q.W.); (S.W.); (M.Z.); (X.Y.); (Z.Y.); (B.M.)
| | - Biao Ma
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (Q.W.); (S.W.); (M.Z.); (X.Y.); (Z.Y.); (B.M.)
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Zhou X, Wang S, Ma Y, Jiang Y, Li Y, Shi J, Deng G, Tian G, Kong H, Wang X. On-Site and Visual Detection of the H5 Subtype Avian Influenza Virus Based on RT-RPA and CRISPR/Cas12a. Viruses 2024; 16:753. [PMID: 38793634 PMCID: PMC11125590 DOI: 10.3390/v16050753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/04/2024] [Accepted: 05/06/2024] [Indexed: 05/26/2024] Open
Abstract
Avian influenza viruses (AIVs) of the H5 subtype rank among the most serious pathogens, leading to significant economic losses in the global poultry industry and posing risks to human health. Therefore, rapid and accurate virus detection is crucial for the prevention and control of H5 AIVs. In this study, we established a novel detection method for H5 viruses by utilizing the precision of CRISPR/Cas12a and the efficiency of RT-RPA technologies. This assay facilitates the direct visualization of detection results through blue light and lateral flow strips, accurately identifying H5 viruses with high specificity and without cross-reactivity against other AIV subtypes, NDV, IBV, and IBDV. With detection thresholds of 1.9 copies/μL (blue light) and 1.9 × 103 copies/μL (lateral flow strips), our method not only competes with but also slightly surpasses RT-qPCR, demonstrating an 80.70% positive detection rate across 81 clinical samples. The RT-RPA/CRISPR-based detection method is characterized by high sensitivity, specificity, and independence from specialized equipment. The immediate field applicability of the RT-RPA/CRISPR approach underscores its importance as an effective tool for the early detection and management of outbreaks caused by the H5 subtype of AIVs.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Huihui Kong
- State Key Laboratory of Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China; (X.Z.); (S.W.); (Y.M.); (Y.J.); (Y.L.); (J.S.); (G.D.); (G.T.)
| | - Xiurong Wang
- State Key Laboratory of Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China; (X.Z.); (S.W.); (Y.M.); (Y.J.); (Y.L.); (J.S.); (G.D.); (G.T.)
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Wang J, Lei B, Zhang W, Li L, Ji J, Liu M, Zhao K, Yuan W. Preparation of Monoclonal Antibodies against the Capsid Protein and Development of an Epitope-Blocking Enzyme-Linked Immunosorbent Assay for Detection of the Antibody against Porcine Circovirus 3. Animals (Basel) 2024; 14:235. [PMID: 38254404 PMCID: PMC10812811 DOI: 10.3390/ani14020235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/04/2024] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
Porcine circovirus type 3 (PCV3) is endemic in swine worldwide and causes reproductive disorders, dermatitis and nephrotic syndrome, and multi-organ inflammation. Currently, there is a growing need for rapid and accurate diagnostic methods in disease monitoring. In this study, four monoclonal antibodies (mAbs) against PCV3 capsid proteins were prepared (mAbs 2F6, 2G8, 6E2, and 7E3). MAb 7E3, which had the highest binding affinity for the Cap protein, was chosen for further investigation. A novel B cell epitope 110DLDGAW115 was identified using mAb 7E3. An epitope-blocking (EB) enzyme-linked immunosorbent assay (ELISA) was successfully developed using horseradish-peroxidase-labeled mAb 7E3 to detect PCV3 antibodies in porcine sera. Moreover, the EB-ELISA showed no specific reaction with other porcine disease sera, and the cut-off value was defined as 35%. Compared with the commercial ELISA, the percentage agreement was 95.59%. Overall, we have developed a novel EB-ELISA method that accurately and conveniently detects PCV3 in serum, making it a valuable tool for the clinical detection of PCV3 infection.
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Affiliation(s)
- Junli Wang
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Baishi Lei
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Wuchao Zhang
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Lijie Li
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Jiashuang Ji
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Mandi Liu
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Kuan Zhao
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
- Hebei Veterinary Biotechnology Innovation Center, Hebei Agricultural University, Baoding 071000, China
| | - Wanzhe Yuan
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
- Hebei Veterinary Biotechnology Innovation Center, Hebei Agricultural University, Baoding 071000, China
- North China Research Center of Animal Epidemic Pathogen Biology, China Agriculture Ministry, Baoding 071000, China
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Sakyi ME, Kamio T, Kohyama K, Rahman MM, Shimizu K, Okada A, Inoshima Y. Assessing of the use of proteins A, G, and chimeric protein AG to detect marine mammal immunoglobulins. PLoS One 2023; 18:e0291743. [PMID: 37733771 PMCID: PMC10513184 DOI: 10.1371/journal.pone.0291743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 09/05/2023] [Indexed: 09/23/2023] Open
Abstract
In recent years, there has been an increase in infectious diseases in marine mammals, including brucellosis, infections of morbillivirus, herpesvirus, and poxvirus. Several serological diagnostic methods, including enzyme-linked immunosorbent assays, immunofluorescence assays (ELISA), and western blotting, have been used to detect antibodies against pathogens in marine mammals. However, options for commercial secondary antibodies used to detect antibodies in marine mammals are limited; therefore, the use of proteins A, G, or chimeric protein AG may provide a suitable alternative. This study aimed to assess the use of proteins A, G, and chimeric protein AG to detect marine mammal immunoglobulins. Currently, there are no comparative studies on the use of proteins A, G, and chimeric protein AG for the detection of immunoglobulins in marine mammals. In this study, we used ten pinnipeds' species (Baikal seal, California sea lion, harbor seal, northern fur seal, ringed seal, South American fur seal, South American sea lion, spotted seal, Steller sea lion, and walrus) and five cetacean species (beluga whale, bottlenose dolphin, harbor porpoise, killer whale, and Pacific white-sided dolphin) and compare binding ability to proteins A, G, or chimeric protein AG by ELISA. The results revealed that the immunoglobulins from pinniped and cetacean species reacted more strongly to protein A than protein G. In addition, the immunoglobulins of pinnipeds and cetaceans showed a strong binding ability to chimeric protein AG. These results suggest that proteins A, G, and chimeric protein AG would be used to help further develop serological assays.
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Affiliation(s)
- Michael Essien Sakyi
- Cooperative Department of Veterinary Medicine, Laboratory of Food and Environmental Hygiene, Gifu University, Gifu, Japan
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Takashi Kamio
- Cooperative Department of Veterinary Medicine, Laboratory of Food and Environmental Hygiene, Gifu University, Gifu, Japan
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
- Port of Nagoya Public Aquarium, Nagoya, Aichi, Japan
| | | | - Md. Matiur Rahman
- Cooperative Department of Veterinary Medicine, Laboratory of Food and Environmental Hygiene, Gifu University, Gifu, Japan
- Faculty for Veterinary, Department of Medicine, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Kaori Shimizu
- Cooperative Department of Veterinary Medicine, Laboratory of Food and Environmental Hygiene, Gifu University, Gifu, Japan
| | - Ayaka Okada
- Cooperative Department of Veterinary Medicine, Laboratory of Food and Environmental Hygiene, Gifu University, Gifu, Japan
- Education and Research Center for Food Animal Health, Gifu University (GeFAH), Gifu, Japan
| | - Yasuo Inoshima
- Cooperative Department of Veterinary Medicine, Laboratory of Food and Environmental Hygiene, Gifu University, Gifu, Japan
- Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
- Education and Research Center for Food Animal Health, Gifu University (GeFAH), Gifu, Japan
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Hu Z, Guo K, Du C, Sun J, Naletoski I, Chu X, Lin Y, Wang X, Barrandeguy M, Samuel M, Wang W, Lau PI, Wernery U, Raghavan R, Wang X. Development and evaluation of a blocking ELISA for serological diagnosis of equine infectious anemia. Appl Microbiol Biotechnol 2023; 107:3305-3317. [PMID: 37039847 DOI: 10.1007/s00253-023-12504-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 03/19/2023] [Accepted: 03/25/2023] [Indexed: 04/12/2023]
Abstract
Equine infectious anemia (EIA) is an important viral disease characterized by persistent infection in equids worldwide. Most EIA cases are life-long virus carriers with low antibody reactions and without the appearance of clinical symptoms. A serological test with high sensitivity and specificity is required to detect inapparent infection. In this study, a B-cell common epitope-based blocking ELISA (bELISA) was developed using a monoclonal antibody together with the EIAV p26 protein labelled with HRP. The test has been evaluated against the standard and with field serum samples globally. This bELISA test can be completed within 75 min, and the sensitivity is higher than those of either the AGID or one commercial cELISA kit. This bELISA assay was 8-16 times more analytically sensitive than AGID, and 2 to 4 times more analytically sensitive than one cELISA kit by testing three sera from the USA, Argentina, and China, respectively. The 353 serum samples from Argentina were tested, in comparison with AGID, the diagnostic sensitivity and specificity of our bELISA assay were 100% (154/154) and 97.0% (193/199), respectively, and the accuracy of the bELISA test was 98.3%. The bELISA test developed in this study is a rapid, sensitive, specific method for the detection of EIAV infection, and could be a promising candidate for use in the monitoring of the EIA epidemic worldwide. KEY POINTS: • A universal epitope-based blocking enzyme-linked immunosorbent assay (bELISA) was developed for detection of antibodies to EIAV. • The bELISA assay can be used to test EIAV serum samples from different regions of the world including North America, South America, Europe, and Asia. • The bELISA assay was evaluated in three different international labs and showed a better performance than other commercial kits.
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Affiliation(s)
- Zhe Hu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China
- WOAH Reference Laboratory for Equine Infectious Anemia, Harbin, China
| | - Kui Guo
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China
| | - Cheng Du
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China
| | - Jinhui Sun
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China
- Northeast Agricultural University, Harbin, China
| | - Ivancho Naletoski
- Animal Production and Health Section, Joint FAO/IAEA Centre for Nuclear Applications in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Vienna, Austria
| | - Xiaoyu Chu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yuezhi Lin
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China
| | - Xuefeng Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China
| | - Maria Barrandeguy
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Virología, Pilar, Buenos Aires, Argentina
- Facultad de Ciencias Agrarias Y Veterinarias, Universidad del Salvador, Pilar, Buenos Aires, Argentina
| | - Miño Samuel
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Virología, Pilar, Buenos Aires, Argentina
| | - Wen Wang
- Animal Health Supervision Institute of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Patrick Imtung Lau
- Equine Disease Division, Agriculture Fisheries and Conservation Department, Hong Kong, China
| | - Ulrich Wernery
- Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Rekha Raghavan
- Central Veterinary Research Laboratory, Dubai, United Arab Emirates
| | - Xiaojun Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin, China.
- WOAH Reference Laboratory for Equine Infectious Anemia, Harbin, China.
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A new nanobody-enzyme fusion protein-linked immunoassay for detecting antibodies against influenza A virus in different species. J Biol Chem 2022; 298:102709. [PMID: 36402446 PMCID: PMC9763686 DOI: 10.1016/j.jbc.2022.102709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/09/2022] [Accepted: 11/10/2022] [Indexed: 11/18/2022] Open
Abstract
Circulation of influenza A virus (IAV), especially within poultry and pigs, continues to threaten public health. A simple and universal detecting method is important for monitoring IAV infection in different species. Recently, nanobodies, which show advantages of easy gene editing and low cost of production, are a promising novel diagnostic tool for the monitoring and control of global IAVs. In the present study, five nanobodies against the nucleoprotein of H9N2 IAV were screened from the immunized Bactrian camel by phage display and modified with horseradish peroxidase (HRP) tags. Out of which, we determined that H9N2-NP-Nb5-HRP can crossreact with different subtypes of IAVs, and this reaction is also blocked by positive sera for antibodies against different IAV subtypes. Epitope mapping showed that the nanobody-HRP fusion recognized a conserved conformational epitope in all subtypes of IAVs. Subsequently, we developed a nanobody-based competitive ELISA (cELISA) for detecting anti-IAV antibodies in different species. The optimized amount of coating antigen and dilutions of the fusion and testing sera were 100 ng/well, 1:4000, and 1:10, respectively. The time for operating the cELISA was approximately 35 min. The cELISA showed high sensitivity, specificity, reproducibility, and stability. In addition, we found that the cELISA and hemagglutination inhibition test showed a consistency of 100% and 87.91% for clinical and challenged chicken sera, respectively. Furthermore, the agreement rates were 90.4% and 85.7% between the cELISA and commercial IEDXX ELISA kit. Collectively, our developed nanobody-HRP fusion-based cELISA is an ideal method for monitoring IAV infection in different species.
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Durairaj K, Than DD, Nguyen ATV, Kim HS, Yeo SJ, Park H. Cysteamine-Gold Coated Carboxylated Fluorescent Nanoparticle Mediated Point-of-Care Dual-Modality Detection of the H5N1 Pathogenic Virus. Int J Mol Sci 2022; 23:ijms23147957. [PMID: 35887315 PMCID: PMC9320457 DOI: 10.3390/ijms23147957] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 07/13/2022] [Accepted: 07/16/2022] [Indexed: 12/10/2022] Open
Abstract
Globally, point-of-care testing (POCT) is the most preferable on-site technique for disease detection and includes a rapid diagnostic test (RDT) and fluorescent immunochromatographic strip test (FICT). The testing kits are generally insufficient in terms of signal enhancement, which is a major drawback of this approach. Sensitive and timely on-site POCT methods with high signal enhancement are therefore essential for the accurate diagnosis of infectious diseases. Herein, we prepare cysteamine-gold coated carboxylated europium chelated nanoparticle (Cys Au-EuNPs)-mediated POCT for the detection of the H5N1 avian influenza virus (AIV). Commercial nanoparticles were used for comparison. The spectral characteristics, surface morphologies, functional groups, surface charge and stability of the Cys AuNPs, EuNPs, and Cys Au-EuNPs were confirmed by UV-visible spectrophotometry, fluorescence spectrometry, transmission electron microscope with Selected area electron diffraction (TEM-SAED), Fourier-transform infrared spectroscopy (FTIR) and zeta potential analysis. The particle size distribution revealed an average size of ~130 ± 0.66 nm for the Cys Au-EuNPs. The Cys Au-EuNP-mediated RDT (colorimetric analysis) and FICT kit revealed a limit of detection (LOD) of 10 HAU/mL and 2.5 HAU/mL, respectively, for H5N1 under different titer conditions. The obtained LOD is eight-fold that of commercial nanoparticle conjugates. The photo luminance (PL) stability of ~3% the Cys Au-EuNPs conjugates that was obtained under UV light irradiation differs considerably from that of the commercial nanoparticle conjugates. Overall, the developed Cys Au-EuNPs-mediated dual-mode POCT kit can be used as an effective nanocomposite for the development of on-site monitoring systems for infectious disease surveillance.
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Affiliation(s)
- Kaliannan Durairaj
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, Iksan 54538, Korea; (K.D.); (D.D.T.); (A.T.V.N.)
| | - Duc Duong Than
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, Iksan 54538, Korea; (K.D.); (D.D.T.); (A.T.V.N.)
| | - Anh Thi Viet Nguyen
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, Iksan 54538, Korea; (K.D.); (D.D.T.); (A.T.V.N.)
| | - Hak Sung Kim
- College of Pharmacy, Wonkwang University, Iksan 54538, Korea;
| | - Seon-Ju Yeo
- Department of Tropical Medicine and Parasitology, Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul 03080, Korea
- Correspondence: (S.-J.Y.); (H.P.)
| | - Hyun Park
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, Iksan 54538, Korea; (K.D.); (D.D.T.); (A.T.V.N.)
- Correspondence: (S.-J.Y.); (H.P.)
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